@article{a3a69a9a5dbd464ca67d68b3c14e293b,
title = "Improved Measurement of Solar Neutrinos from the Carbon-Nitrogen-Oxygen Cycle by Borexino and Its Implications for the Standard Solar Model",
abstract = "We present an improved measurement of the carbon-nitrogen-oxygen (CNO) solar neutrino interaction rate at Earth obtained with the complete Borexino Phase-III dataset. The measured rate, RCNO=6.7-0.8+2.0 counts/(day×100 tonnes), allows us to exclude the absence of the CNO signal with about 7σ C.L. The correspondent CNO neutrino flux is 6.6-0.9+2.0×108 cm-2 s-1, taking into account the neutrino flavor conversion. We use the new CNO measurement to evaluate the C and N abundances in the Sun with respect to the H abundance for the first time with solar neutrinos. Our result of NCN=(5.78-1.00+1.86)×10-4 displays a ∼2σ tension with the {"}low-metallicity{"}spectroscopic photospheric measurements. Furthermore, our result used together with the Be7 and B8 solar neutrino fluxes, also measured by Borexino, permits us to disfavor at 3.1σ C.L. the {"}low-metallicity{"}standard solar model B16-AGSS09met as an alternative to the {"}high-metallicity{"}standard solar model B16-GS98.",
author = "{(Borexino Collaboration)} and S. Appel and Z. Bagdasarian and D. Basilico and G. Bellini and J. Benziger and R. Biondi and B. Caccianiga and F. Calaprice and A. Caminata and P. Cavalcante and A. Chepurnov and D. D'Angelo and A. Derbin and {Di Giacinto}, A. and {Di Marcello}, V. and Ding, {X. F.} and {Di Ludovico}, A. and {Di Noto}, L. and I. Drachnev and D. Franco and C. Galbiati and C. Ghiano and M. Giammarchi and A. Goretti and G{\"o}ttel, {A. S.} and M. Gromov and D. Guffanti and Aldo Ianni and Andrea Ianni and A. Jany and V. Kobychev and G. Korga and S. Kumaran and M. Laubenstein and E. Litvinovich and P. Lombardi and I. Lomskaya and L. Ludhova and G. Lukyanchenko and I. Machulin and J. Martyn and E. Meroni and L. Miramonti and M. Misiaszek and V. Muratova and R. Nugmanov and L. Oberauer and V. Orekhov and F. Ortica and M. Pallavicini",
note = "Funding Information: We acknowledge the generous hospitality and support of the Laboratori Nazionali del Gran Sasso (Italy). The Borexino program is made possible by funding from Istituto Nazionale di Fisica Nucleare (INFN) (Italy), National Science Foundation (NSF) (USA), Deutsche Forschungsgemeinschaft (DFG), Cluster of Excellence PRISMA+ (Project ID 39083149), and recruitment initiative of Helmholtz-Gemeinschaft (HGF) (Germany), Russian Foundation for Basic Research (RFBR) (Grant No. 19-02-00097A) and Russian Science Foundation (RSF) (Grant No. 21-12-00063) (Russia), and Narodowe Centrum Nauki (NCN) (Grant No. UMO 2017/26/M/ST2/00915) (Poland). We gratefully acknowledge the computing services of Bologna INFN-CNAF data centre and U-Lite Computing Center and Network Service at LNGS (Italy). F. L. V. acknowledges support by “Neutrino and Astroparticle Theory Network” under the programme PRIN 2017 funded by the Italian Ministry of Education, University and Research (MIUR) and INFN Iniziativa Specifica TAsP. Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society.",
year = "2022",
month = dec,
day = "16",
doi = "10.1103/PhysRevLett.129.252701",
language = "English (US)",
volume = "129",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",
}